<template>
  <div>
    <!--  面包屑导航区-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>分类参数</el-breadcrumb-item>
    </el-breadcrumb>
    <!--    卡片视图-->
    <el-card>
      <!--      警告区-->
      <el-alert :closable="false" show-icon
                title="注意！只允许为第三级分类设置相关参数"
                type="warning">
      </el-alert>
      <!--      选择商品分类区域-->
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类: </span>
          <!-- 选择商品分类的级联选择框 -->
          <el-cascader
              expand-trigger="hover"
              :options="catelist"
              :props="cateProps "
              v-model="selectedCateKeys"
              @change="handleChange">
          </el-cascader>
        </el-col>
      </el-row>
      <!--      tab页签区域-->
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <!--  添加动态参数的面板 -->
        <el-tab-pane label="动态参数" name="many">
          <el-button type="primary" size="mini"
                     :disabled="isBtnDisabled" @click="dialogVisible=true">添加参数
          </el-button>
          <!--          动态参数表格-->
          <el-table :data="manyTableData" border stripe>
            <!--            展开行-->
            <el-table-column type="expand">
              <!--  循环渲染tag标签  -->
              <template slot-scope="scope">
                <el-tag v-for="(item,i) in scope.row.attr_vals"
                        :key="i" closable @close="handleCiose(i,scope.row)">{{ item }}
                </el-tag>
                <el-input
                    class="input-new-tag"
                    v-if="scope.row.inputVisible"
                    v-model="scope.row.inputValue"
                    ref="saveTagInput"
                    size="small"
                    @keyup.enter.native="handleInputConfirm(scope.row)"
                    @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">
                  编辑
                </el-button>
                <el-button size="mini" type="danger" icon="el-icon-delete" @click="romove(scope.row.attr_id)">删除
                </el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>


        <!--  添加静态属性的面板 -->
        <el-tab-pane label="静态属性" name="only">
          <el-button type="primary" size="mini"
                     :disabled="isBtnDisabled" @click="dialogVisible=true">添加属性
          </el-button>
          <!--          静态参数表格-->
          <el-table :data="onlyTableData" border stripe>
            <!--            展开行-->
            <el-table-column type="expand">
              <!--  循环渲染tag标签  -->
              <template slot-scope="scope">
                <el-tag v-for="(item,i) in scope.row.attr_vals"
                        :key="i" closable @close="handleCiose(i,scope.row)">{{ item }}
                </el-tag>
                <el-input
                    class="input-new-tag"
                    v-if="scope.row.inputVisible"
                    v-model="scope.row.inputValue"
                    ref="saveTagInput"
                    size="small"
                    @keyup.enter.native="handleInputConfirm(scope.row)"
                    @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column label="属性名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">
                  编辑
                </el-button>
                <el-button size="mini" type="danger" icon="el-icon-delete" @click="romove(scope.row.attr_id)">删除
                </el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>

      </el-tabs>
    </el-card>

    <!--    添加参数的对话框-->
    <el-dialog
        :title="'添加'+ titleText"
        :visible.sync="dialogVisible"
        width="50%" @close="adddialogclose"
    >
      <el-form :model="addForm" :rules="addFormrules" ref="addFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
    <el-button @click="dialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addprands">确 定</el-button>
  </span>
    </el-dialog>

    <!--    修改参数对话框-->
    <el-dialog
        :title="'修改'+ titleText"
        :visible.sync="editdialogVisible"
        width="50%" @close="editdialogclose"
    >
      <el-form :model="editForm" :rules="editFormrules" ref="editFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
    <el-button @click="editdialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="editprands">确 定</el-button>
  </span>
    </el-dialog>

  </div>
</template>

<script>
export default {
  name: "Params",
  inject: ['reload'],
  data() {
    return {
      //商品分类列表
      catelist: [],
      //级联选择框的配置对象
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      //级联选择器 双向绑定的数组
      selectedCateKeys: [],
      //tab页签的双向绑定
      activeName: 'many',
      //动态数据
      manyTableData: [],
      //静态数据
      onlyTableData: [],
      //控制添加对话框的显示与隐藏
      dialogVisible: false,
      //添加参数的表单数据对象
      addForm: {
        attr_name: ''

      },
      addFormrules: {
        attr_name: [
          {required: true, message: '请输入参数名称', trigger: 'blur'},
        ]
      },
      //修改表单数据对象
      editForm: {},
      //修改参数对话框
      editdialogVisible: false,
      editFormrules: {
        attr_name: [
          {required: true, message: '请输入参数名称', trigger: 'blur'},
        ]
      },
      //按钮与文本框切换显示
      inputVisible:false,
      //文本框中输入的内容
      inputValue:''

    }
  },
  created() {
    //获取所有商品分类列表
    this.getCateList()
  },
  methods: {
    //获取所有数据
    async getCateList() {
      const {data: res} = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取数据失败');
      }
      this.catelist = res.data;
    },
    //级联选择框中的项发生变化   会触发这个函数
    handleChange() {
      this.gitParamsData()

    },
    //tab页签点击事件
    handleTabClick() {
      console.log(this.activeName)
      this.gitParamsData()
    },
    //获取参数的列表数据
    async gitParamsData() {
      //因为要求只能选三级  所以数组长度不等于三 就让级联选择器选中数组清空
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys = []
        this.manyTableData=[]
        this.onlyTableData=[]
        return
      }
      //根据所选分类的id，和当前所属的面板，获取对应的参数
      const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes`, {
        params:
            {sel: [this.activeName]}
      })
      console.log(res)
      res.data.forEach(item => {
        //把数据库的字符串  以，分割成一个数组
        item.attr_vals = item.attr_vals ? item.attr_vals.split(',') : []
        //  控制文本框的显示与隐藏
        item.inputVisible = false
        //  文本框中输入的值
        item.inputValue=''
      })
      if (res.meta.status !== 200) {
        this.$message.error('请求数据失败')
      }

      if (this.activeName === 'many') {
        this.manyTableData = res.data//动态表格数据
      } else {
        this.onlyTableData = res.data//静态表格数据
      }
    },
    //监听添加对话框的关闭事件
    adddialogclose() {
      this.$refs.addFormRef.resetFields()
    },
    addprands() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        const {data: res} = await this.$http.post(`categories/${this.cateId}/attributes`, {
          attr_name: this.addForm.attr_name,
          attr_sel: this.activeName,
        })
        if (res.meta.status !== 201) {
          return this.$message.error('添加参数失败')
        }
        this.$message.success('添加参数成功')
        this.dialogVisible = false
        this.gitParamsData()
      })
    },
    //点击按钮展示修改的对话框
    async showEditDialog(attr_id) {
      const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`, {
        params:
            {attr_sel: this.activeName}
      })
      if (res.meta.status !== 200) {
        this.$message.error('获取参数信息失败')
      }
      this.editForm = res.data
      this.editdialogVisible = true
    },
    //点击按钮修改信息
    editprands() {
      this.$refs.editFormRef.validate(async valida => {
            if (!valida) return
            const {data: res} = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`, {
              attr_name: this.editForm.attr_name,
              attr_sel: this.activeName
            })
            if (res.meta.status !== 200) {
              this.$message.error('修改参数失败')
            }
            this.$message.success('修改参数成功')
            this.gitParamsData()
            this.editdialogVisible = false
          }
      )
    },
    //清空修改对画框数据
    editdialogclose() {
      this.$refs.editFormRef.resetFields()
    },
    //删除
    romove(id) {

      this.$confirm('此操作将永久删除该数据, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(async () => {
        const {data: res} = await this.$http.delete(`categories/${this.cateId}/attributes/${id}`)
        console.log(res.meta.status);
        if (res.meta.status !== 200) {
          this.$message.error('删除数据失败')
        }
        this.$message.success('删除成功')
        this.gitParamsData()
        //     this.reload()
        this.re
      }).catch(e => {
        this.$message.error(e);
      });
    }
    ,
  //  文本框失去焦点，或按下了回车
   async handleInputConfirm (row) {
      if (row.inputValue.trim().length ===0){
        row.inputValue = ''
        row.inputVisible = false
        return
      }
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
    //  需要发起请求  来保存这次操作
    this.save(row)
    },
    //点击按钮，展示文本输入框
    showInput(row) {
      row.inputVisible = true;
      this.$nextTick(_ => {
        //让文本框自动获得焦点
        this.$refs.saveTagInput.$refs.input.focus();
      });
    },
   async save(row){
      const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,
          {
            attr_name:row.attr_name,
            attr_sel:row.attr_sel,
            attr_vals:row.attr_vals.join(',')
          })
      if( res.meta.status !==200){
        return  this.$message.error('修改数据失败')
      }

      this.$message.success('修改成功')
    },
    //删除对应的参数可选项
    handleCiose(i,row){
      row.attr_vals.splice(i,1)
      this.save(row)
    }

  },
  computed: {
    //如果按钮需要被禁用，则返回true，否则返回false
    isBtnDisabled() {
      if (this.selectedCateKeys.length !== 3) {
        return true
      }
      return false
    },
    //当前选中的三级分类的id
    cateId() {
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[2]
      }
      return null
    },
    //动态计算标题的文化
    titleText() {
      if (this.activeName === 'many') {
        return '动态参数'
      }
      return '静态属性'
    }
  },
  watch: {}
}
</script>

<style lang="less" scoped>
.cat_opt {
  margin: 20px 0;
}

.el-tag {
  margin: 8px;
}
.input-new-tag {
 width: 120px;
}
</style>